/* 小demo部分模块--- */
.demo_box {
    position: relative;
    margin-top: 150px;
}
.demo_box .cl {
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    flex-wrap: wrap;
}
.demo_box article {
    margin: 30px 50px 0px 50px;
    width: 20%;
    border-radius: 10px;
    box-shadow: 0px 0px 45px -20px #fff;
    background-color: rgba(0, 0, 0, 0.5);
    transition: all 0.5s ease 0s;
}
.demo_box article:hover {
    margin: 30px 50px 0px 50px;
    width: 28%;
    border-radius: 10px;
    box-shadow: 0px 0px 0px 0px #fff;
    background-color: rgba(0, 0, 0, 1);
    transition: all 0.5s ease 0s;
}
.demo_box article div {
    width: 100%;
    height: 180px;
    border-top-right-radius: 10px;
    border-top-left-radius: 10px;
}
.demo_box article div img {
    width: 100%;
    height: 100%;
    border-top-right-radius: 10px;
    border-top-left-radius: 10px;
    object-fit: cover;
}
.demo_box article h3 {
    margin: 10px 0px 10px 30px;
    font-size: 1.7rem;
}
.demo_box article h3 a {
    color: rgb(230, 230, 230);
}
.demo_box article h3 a:hover {
    color: rgb(244, 255, 87);
    text-shadow: 0px 0px 15px #fff;
}
.demo_box article .description {
    display: -webkit-box;
    padding: 0px 5px;
    width: 100%;
    height: 67px;
    font-size: 1.5rem;
    text-indent: 2em;
    line-height: 1.5;
    overflow: hidden;
    text-overflow: hidden;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    color: rgb(189, 189, 189);
}
.demo_box article .date {
    margin-top: 10px;
    margin-bottom: 10px;
    padding-left: 10px;
    font-size: 1.3rem;
    color: rgb(189, 189, 189);
}
/* 小demo部分模块-end */